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A comment on Scientists find an effective solution for the three-body problem. Parent comment

Re:Scientists find an effective solution for the three-body ... by Grustaf on Saturday August 14, 2021 @07:58AM (#28179957)
Well sure. But my point was that for two bodies you don’t need to simulate at all, you can just get the answer for any point in time.
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Re:Scientists find an effective solution for the three-body ... by phreeza on Saturday August 14, 2021 @11:54AM (#28181631)
The need for numerical simulations is completely unrelated to the predictability and/or stability of the system. If you have a Lyapunov exponent smaller than 0 everywhere, errors don't accumulate and you can simulate numerically for as long as you like.
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Re:Scientists find an effective solution for the three-body ... by Grustaf on Saturday August 14, 2021 @02:53PM (#28183058)
It's not unrelated, but the implication only goes in one direction. If you have a closed form solution, that implies that you can model it completely forever, but sure the opposite is not true.
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